21849288047 has 2 divisors, whose sum is σ = 21849288048. Its totient is φ = 21849288046.

The previous prime is 21849288037. The next prime is 21849288049. The reversal of 21849288047 is 74088294812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21849288047 - 2¹⁸ = 21849025903 is a prime.

Together with 21849288049, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21849288047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21849288049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10924644023 + 10924644024.

It is an arithmetic number, because the mean of its divisors is an integer number (10924644024).

Almost surely, 2^21849288047 is an apocalyptic number.

21849288047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21849288047 is an equidigital number, since it uses as much as digits as its factorization.

21849288047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 21849288047 in words is "twenty-one billion, eight hundred forty-nine million, two hundred eighty-eight thousand, forty-seven".